Water cooler



Oct. 27, 1931. G. J. HUNTLEY WATER COOLER Filed April 19. 1929 2Sheets-Sheer.

,4: ATTORNEY.

Oct. 27, 1931. G. .1. HU.NTLEY WATER COOLER Filed April 19. 1929 2Sheets-Sheer 2 Patented Oct. 27, 1931 UNITED STATES PATENT OFFICE GEORGEJ. HUNTLEY, OF BALTIMORE, MARYLAND, ASSIGNOR TO CROWN CORK & SEALCOMPANY, OF NEW YORK, N. Y.,

WATER Application filed April 19,

My invention relates to water coolers, and more particularly toapparatus of this type for pre-cooling water preparatory to its deliveryto carbonating and bottle filling machines of various types.

In making carbonated beverages, it has been the practice to cool thewater preparatory to admixing therewith CO the lowering of thetemperature of the water expediting the absorption of the gas thereby,and ensuring a proper charging of the water therewith. The extent towhich the temperature of the water was lowered was dependent largelyupon the character of the bottle fillingmachine, lower temperaturesbeing required with low pressure machines than with high pressuremachines.

Prior to my invention, the general practice in bottling establishmentswas to provide a large reservoir of the water to be carbonated, and tobring the contents of'thef reservoir to the desired temperature by meansof an ord nary refrigerating plant, the capacity of such reservoir beingsuch as to provide for a prolonged run of the bottling machines. Suchequipment was not only expensive to install and to maintain, but since alarge volume of water was required, considerable time was necessary tobring it to the desired temperature before it was suitable for use withthe carbonating and bottling machines. This involved a loss of time inpreparing for a run of such machines, due to the time interval requiredto bring a considerable volume of water to the proper temperature.Furthermore, with such equipment, there was always a possibility, withthe changing volume of water in the tank or reservoir, of variation inthe pressure conditions at the bottling machine due to changingtemperatures of the water in the reservoir.

lVith the above conditions in mind, I have provided a water cooler ofthe type above referred to, by means of which water in small volume mayhave its temperature rapidly lowered while flowing to a relatively smallstorage compartment, as compared with the reservoirs formerly used, thiscompartment being provided with condensing coils which will maintain thewater at the desired tem- A CORPORATION 01 NEW YORK COOLER 1929. SerialNo. 356,364.

perature. B utilizing a construction such as is hereina er described, Iam enabled to provide what may be termed a continuously operatingcooler, since with the withdrawal of water from the storage compartment,water, to approximately the amount of that withdrawn, will be deliveredto the storage compartmentat substantially the temperature of the waterwithin said compartment.

As will more fully appear hereinafter, the cooler of my inventioncontemplates the use of refrigerating coils located above the storagecompartment, over which coils the supply of water, which may be termedthe replacement supply, is flowed in a thin film or trickle so as torapidly bring it to the desired low temperature before delivery to thestorage compartment. I'n order to limit the supply of water to thequantity required for replacement urposes, I provide a water levelcontrol wit in the compartment,.by means of which the delivery of waterto the cooler will occur only upon the lowering of the level of thewater in the storage compartment, and the supply of water will beautomatically interrupted when the normal level of the water in thecompartment has been restored.

The withdrawal of water from the storage compartment is not constant,and preparatory to the initial run of the carbonating and bottlingmachines, and at times, with the stoppage of such machines, the watersupply will be interrupted, thus introducing conditions in the systemwhich, when the water is not at the desired temperature, or is slightlyabove this temperature, would result in a continued operation of thecompressor while no water was trickling over the coils above the storagecompartment.

To avoid this condition, I so construct the apparatus that at all timeswhile the compressor is operating, irrespective of whether water isbeing withdrawn from the cooler or not, there will be maintained a flowof water through the apparatus, thus precluding any possibility ofinjury to the compressor as a result of the failure of the vapor in therefrigerating coils to be properly condensed. I also provide athermostatic control for the compressor so that when the water is at thetil desired temperature, the power to the compressor will beautomatically interrupted, which is a further safeguard against possibleinjury to the compressor as a result of improper condensation of theammonia or other refrigerating medium circulating through the expansioncoils.

In order to effectually and economically cool the water, I provide thestorage compartment with a system of bafiles, along and about which thewater must flow from the delivery point thereof to the compartment tothe withdrawal point thereof, thus efi'ectively utilizing the expansioncoils submerged in the water in this compartment, for supplementing theaction of the coil over which the water trickles prior to its deliveryto the compartment in bringing the water to the desired low temperature,as well as maintaining this temperature of the water in the compartment.

The cooler of my invention may be compactly constructed by reason of thehigh efficiency of the refrigerating mechanisms and the small volume ofwater acted upon thereby at any one time, as well as the low capacity ofthe storage compartment. This small size of the apparatus permits it tobe located closely adjacent the filling machines, so that by properinsulation of the outlet pipe the heat loss will be negligible.

The main results secured in the apparatus of the invention are economyof floor space, a rapid attainment of the desired low temperatures ofthe water, the maintenance of a substantially constant temperaturethereof,

accessibility to various parts for inspection and cleaning purposes, andgreat reliability throughout a continued operation of the cooler.

The invention consists primarily in a water cooler embodying therein aheat insulated casing, having a storage compartment toward the bottomthereof, a refrigerating coil above said compartment, a feed watersource communicating with said casing above said coil, meansdistributing water from said feed Water source and delivering it insmall volume upon said coil, refrigerating means within said storagecompartment, means supplying a refrigerating medium to saidrefrigerating coil and said refrigerating means respectively and anofftake adjacent the bottom of said compartment; and in such other novelfeatures of construction and combination of parts, as are hereinafterset forth and described, and more particularly pointed out in the claimshereto appended.

Referring to the drawings,

Fig. 1 is a vertical section through a water cooler embodying theinvention, partly broken away;

Fig. 2 is a section on the line 2-2 of Fig. 1; and

.Fig. 3 is a section on the line 33 of Fig. 1 with the distributingtrough and feed water header partly broken away, and the compressorequipment and local circulating pump shown diagrammatically.

Like numerals refer to like parts throughout the several views.

In the embodiment of the invention shown in the drawings, the main heatinsulated casing of the water cooler is shown at 10, this casing beingprovided with a proplerly insulated door 11 having a suitable lig t ofglass 12 therein to permit the inspection of the interior of the coolerat all times. The detailed construction of such parts is notillustrated, particularly as such construction is old and well known,and may take a variety of different forms.

The lower part of the casing 10 constitutes a storage ocmpartment 13 forwater previously brought to the desired low temperature as a result ofthe flow or trickle of this water in small volume over a Baudelot coil14 positioned in its entirety above the storage compartment 13. TheBaudelot coil is of a well known construction and mode of operation,consisting of vertically disposed loops occupying the same orsubstantially the same vertical plane.

Above the coil 14 is a troughed distributing header 15 of substantiallythe length of the loops of the coil, this header having a plurality ofsmall outlet openings 16 along the length of the bottom thereofimmediately above the axis of the tube forming the coil 14. The trough15 is closed at both ends, as shown more particularly in Fig. 3, and issupported in any desired manner from the casing 10.

Above the trough 15 is a distributing header pipe 17 having a pluralityof discharge nozzles positioned at different points of the length of thetrough 15. Communicating with the header 17 is a feed water pipe 18which may be connected with the ordinary water service pipe of abuilding, or with a tank for properly filtered water. The flow of waterthrough the feed pipe 18 is controlled by means of a float operatedvalve 19, the operating lever 20 of which is connected by means of therod 21 with a float 22 positioned within the storage compartment in thelower portion of the casing 10.

By this construction, the level of the water in the storage compartmentwill be automatically controlled, and a water supply, commensurate withthe demands upon the cooler, will be delivered upon the Baudelot coilsand discharged within the storage compartment as required.

With the carbonating and bottling machines operating at full capacity,there may be a substantially continuous flow of water to the cooler,providing that the capacity of the same is properly proportioned to thecarbonating and bottling equipment. Owing to the time interval requiredto actuate the float controlled valve, there may be slight variation ofthe water level in the storage compartment 13, although the withdrawalof water and the low capacity of the storage compartment are ordinarilysuch as to ensure a fairly rapid change in the level of the water,causing a quick actuation of the valve. In fact,- during the operationof the cooler, the valve will be constantly fluctuating, thus ensuring asubstantially continuous delivery of water in small volume to the trough15.

The storage compartment 13 is provided with a plurality of sets ofconnected refrigerating coils 23, the different sets being separated bybaflle plates such as 24 and so as to form a tortuous channel, thebeginning of which is adjacent the coil 14, and the end of which isadjacent the ofi'take pipe 26, located adjacent the bottom of thecompartment at one end of the casing 10. The bafiles 24 and 25 abutagainst opposite ends of the casing, and each extends to closelyadjacent the end thereof against which the other bafile abuts, so as toform said continuous tortuous channel and cause a circulation of waterfrom adjacent the point of its delivery to the storage compartment alongthe entire length of the coils 23 which for convenience of expressionwill be referred to as submerged coils) to the point of otftake 26. Thisarrangement ensures ample. space for submerged coils of the desiredcapacity with a short length of the cooler asa who e.

In order to ensure the maximum length of flow of the water from end toend of the channel formed by the baflies 24 and25 within the storagecompartment 13, I position, below the Baudelot coil 14, a troughedmember 27 slightly pitched away from its closed end 28, so that theWater trickling from the coils to within this trough will not only passalong the lowermost loop of the Baudelot coil, but will be deliveredclosely adjacent the closed end of the channel adjacent the baflle 24.

The construction above described causes a circulation'of the feed waterdelivered to the cooler, first in a thin film over the Baudelot coil 14until it flows within the trough 27, and

along this trough until discharged at one end of the tortuous channelformed by the bafiles 24 and 25 to the point where it may be withdrawnthrough the ofltake pipe 26.

By this construction, the water will be rapidly brought, as a result ofits contact with the Baudelot 0011, to approximately the temperaturerequired by the particular form or construction of carbonating andbottling machine with which the cooler is used. If the reduction oftemperature should not-be sulficie'ntly great,=the flow of the waterabout the submerged coils 23 will serve to supplement the action of theBaudelot coil in getting the desired temperature reduction, although inpractice the main function of such coils is to maintain the temperatureof the bulk of water within the storage compartment 13.

In conjunction with a water cooler embodying the invention, I employ arefrigeratingunit of any desired or well known construction, embodyingtherein a compressor for maintaining a desired circulation of ammonia orother refrigerating medium through the coils 23 and 14, the latter beingcoupled directly to the former so as to secure a continuous circulationof the ammonia vapors through the coils 23 and '14.

The compressor is illustrated'conventionally in Fig. 3 at 29, theammonia intake pipe at 30 and the ammonia olftake pipe at 31. Thedetailed construction of the refrigerating unit forms no part of thepresent mvention and is therefore not illustrated. The compressor isdriven, however, from an electric motor 32, the circuit to which iscontrolled by a thermostatic switch 33, the thermostat 34 of whichswitch is located in the 35 storage compartment toward the end thereofadjacent the offtake pipe 26.

It will thus be observed that the operation of the refrigerating unit iscontrolled by the temperature of the water in the storage com-.partment, closely adjacent the point where it will be withdrawntherefrom, and that the continuity of the supply of water to the cooleris controlled by the level of the water in said compartment. As aconsequence, the flow of water over the Baudelot coil may be interruptedbefore the water has attained the desired low temperature,.so that undersome conditions the Baudelot coil might be fully inoperative, eventhough there were 'a continued circulation of the ammonia orother vaportherethrough. This condition would injuriously affect the com ressor,and I there fore so construct the cooler of my invention as to ensure anadequate circulation of water over the Baudelot coil at all times whenthe compressor is operating, which will be so long as the water in thestorage compartment has not attained the desired low temperature. Thisresult I secure entirely independentl of the flow of water from thesource throng the pipe 18.

To maintain such a continuous circulation of water over the Baudelotcoil, I provide a pump 35 having its intake connected with the storagecompartment 13, preferably by means of an intake pipe 36 connected withthe tank offtake pipe 26, and its oiftake pipe 37 discharging into thetrough 15. The pump 35 is motor driven, as by means of the electricmotor 38, the leads to which motor may be connected with the leads tothe motor 32, so that the power to this motor 38 will be placed underthe control of the thermostatic switch 33. This, however, is a merematter of choice, and if desired. the pump 35 may be continuousldriven.-

The I operation of the herein described water cooler is substantially asfollows In describing this operation it will be aslivery of the waterwill not'perm t the sumed that the storage compartment 13 is entirelyempty; the valve controlling the flow of water to the feed pipe 18 isopen, and the circuit to the motor 32, driving the compressor 29 of therefrigerating unit is closed. With the electrical hookup shown, thecircuit to the motor 38 will also be thus closed.

The water delivered to different portions of the trough 15 by means ofthe header 17' will trickle through the various small openings 16 uponthe Baudelot coil, over which they will be diffused and flow in a thinstream until the drip from this coil to within the trough 2 The waterwill flow along this trough toward the intake end of the submerged coils23 from which it will discharge into the storage compartment 13 and flowabout the baflles 24 and 25. Since, when starting with an empty storagecompartment, the valve 19 will be open to the full extent, there will bea rapid accumulation ofwater within the compartment 13. The ra iddeaude- .L

lot coil to extract heat asrapidly irom this.

water as though the quantity of water flowing thereover were smaller.

During this period, the submerged coils will supplement the action ofthe Baudelot coil in extracting heat from the water.

Since the pump 35 will be placed in operation with the closing of thecircuit to the motor 32, the water, as it flows into the compartment 13,will be withdrawn therefrom through the pipes 26 and 36 by the pump 35,and will be discharged by said pump into the trough 15, thusre-circulating the partially cooled water through the cooler, andrapidly bringing the water to the desired low temperature.

When water to approximately the maximum depth desired in thestoragecompartment 13 has accumulated, the float controlled valve 19 will beactuated to interrupt the flow of water through the feed pipe 18 and theheader 17, irrespective of the temperature of the water at this moment.If this temperature be above that required, the refrigerating unit andthe pump 35 will continue to operate, the only water thus passingthrough the cooler being that re-circulated by means of the pump 35.This water will have had a very high percentage of the heat unitsextracted therefrom, but will nevertheless flow over the Baudelot coiland condense the ammonia vapors therein. This re-circulating of thewater will not only ensure a rapid reduction in the temperature of thewater at all times until the desired low temperai ture is-attained, butwill ensure at all times when the compressor 29 is operating an adequatesupply of water to ensure'condensation of the vapor within the coils 14;The submerged coils 23 act to reduce the temperature of the .waterwithin the storage compartment until the desired temperature reductionis secured.

l/Vhen the Water in the compartment 13 has been brought to the desiredlow temperature, the thermostat 34 will actuate the switch 33 tointerrupt the power to the motor 32 and the motor 38, thus stopping thecirculation of ammonia through the coils 23 and 14 and there-circulation of the water by the pump 35.

As the water is withdrawn from the compartment 13 through the ofl'takepipe 26 for use in the carbonating and bottling machines, the level ofthe water in the compartment 13 will be lowered so that the float 22will descend and at least partially open the valve 19 and permit thedelivery of Water in small volume through the intake pipe 18 and header17 to the trough v15.

When the volume of incoming water becomes sufficient to. raise thetemeprature of the volume of water Within the compartment 13, thethermostat 34 will be actua ed to cause the closing of the circuit tothe motors 32 and 38, thus re-starting the circulation of ammoniathrough the coils 23 and 14, and the circulation of the water from thecompartment 13 through the cooler by the pump 35, until the 'volume ofWater in the compartment 13 has been restored and is at the desired lowtemperature.

It will be readily understood that with With the rapid coolin of thewater and the automatic control 0? the inflow thereof determined by thevolume of accumulated water in the compartment, the reserve of waterwithin the cooler may be very much reduced, thus permitting the coolingunit to be brought within small compass. This condition also permits theeffective utilization of a low capacity refrigerating unit, since thiscapacity may be proportioned to the output capacity of the "ank withoutregard to the volume of water within the compartment 13.

The re-circulation of water from the com-- partmentt 13 through thetrough 15 has the advantages of lowering the temperature of the waterflowing through the header17. and of increasing the efiiciency of theBaudelot coil in rapidly securing the desired temperature reduction. 2

Actual experience'has demonstrated that with a properly insulated casing10, the heat losses, even though the cooling unit is not erative, arenot appreciable, so that even r a plant has been shut down over night,the required reduction of temperature of this water, to bring it to thedesired low temperature, ma be as low as 2 F.

It will be obvious that in the normal operation of a cooler, the waterlevel in the compartment 13 will remain substantially constant at alltimes whether water is being withdrawn from said compartment or-not.While there may be a fluctuation in this level it will not beappreciable since the instant that the float 22 descends, or the pumpstarts, the valve 19 will be at least partially opened, and replacementwater will immediately begin to flow toward the compartment 13. With there-circulation of water by the pump 35 there is a tendency to cause aslight raising of the level of the water in the tank as a result of theactuation of the valve 19 during the interval that the water thuswithdrawn by the pump 35 is in circulation. This, however, ismerely atemporary condition and the level'will be restored to its normal hi hpoint as soon as the water is being with rawn for the carbonating andbottling machines.

It is not my intention to limitthe invention to the precise details ofconstruction shown in the accompanying'drawings, it being apparent thatsuch may be varied without departing from the spirit and scope of theinvention.

Having described the invention, what I claim as new and. desire to haveprotected by Letters Patent, is

1. A water cooler embodying therein a heat insulated casing, having astorage comartment toward the bottom thereof, a rerigerating coil abovesaid compartment, a feed water source communicatin with said casingabove said coil, means stributing water from said feed water source anddelivering it-in small volume u on said coil, refrigerating means withinsai storage compartment, means supplying a refrigeratin medium to saidrgrigerating coil and sai refrigerating means, and an ofitake adjacentthe bottom of said compartment.

2. A water cooler embodying therein a heat insulated casing, having astorage compartment toward the bottom thereof, a refrigerating coilabove said compartment, a feed water source communicating with saidcasing above said coil, a valve controlling the flow of water from saidsource into said compartment, actuating means for said valvecontrollable by a change of head of the water in said compartment, meansdistributing water from said feed water source and delivering it insmall volume upon said coil, refrigerating means within said storagecompartment, means delivering a refrigerating medium to said coil, meansdistributing water from said. 7

feed water source and delivering it in small volume upon said coil,refrigerating means within said storage compartment, means de livering arefrigeratin medium to said refrigerating coil and said refrigeratingmeans thermostatically controlled means whereby the operative intervalof the actuation of said means delivering a refrigerating medium to saidrefrigerating coil and said refrigerat ing means is determined by thetemperature variations in the=water in said compartment and an ofl'takeadjacent the bottom of sai compartment.

4. A water cooler embodying therein a heat insulated casing, having astorage compartment toward the bottom thereof, a refrigerating coilabove said compartment, a feed water source communicating with saidcasing above said coil,-means distributing water from said feed watersource and delivering it in small volume upon said coil, refrigeratingmeans Within said storage compartment, means delivering a refrigeratinmedium to said refrigerating coil and sai refrigerating means, anofftake adjacent the bottom of said com artment, and means withdrawingwater rom said compartment and delivering it to said distributing means.1

5. A water cooler embodying therein a heat insulated casing, having astorage com artment toward the bottom thereof, a afile forming acontinuous tortuous channel throu b said compartment, a refrigeratingcoil a ove said compartment, a feed water source communicating with saidcasing above said coil, means distributing water from said feed watersource and delivering it in small volume upon said coil, refrigeratingmeans within said storage compartment, means delivering a refrigeratinmedium to said refrigeratin coil and sai refrigerating means and an 0take adjacent the ottom of sai compartment at one end of said tortuouschannel.

6. A water cooler embodying thereln-a heat insulated casing, having astorage compartment toward the bottom thereof, a refr1gerating coilabove said compartment, a trough within said casing directly above saidre frigerating coil having a plurality of openings through the bottomthereof through which water in small volume is delivered upon said coil,means delivering water within said trough, refrigerating means withinsaid storage compartment, means delivering a re-' frigerating medium tosaid refrigerating coil and said refrigerating means and an ofi'take',jacent the bottom of .said compartment, and

means withdrawing water from said compartmentand delivering it to saidtrough.

8. A .water cooler embodying therein a heat insulated casing, having astorage compartmeut toward'the bottom thereof, a baflle form- 'ing acontinuous tortuous channel through said compartment, a refrigeratingcoil above said compartment, a trough below said refrigeratin coilhaving an'open end adjacent one end 0 the channel formed by said bafile,a feed water source communicating with said casing above said coil,means distributing water from said feed water source and delivering itinsmall volume upon said coil, refrigerating means within said storagecompartment, means delivering a refrigerating medium to saidrefrigerating coil and said refrigerating means, and an ofi'take adjaoent the bottom of said compartment at the end of said tortuous channelopposite to where said trough empties.

9. A water cooler embodying therein a heat insulated casing, having astorage com artment toward the bottom thereof, a refuge-r ating coilabove said compartment, a feed water source communicating with saidcasing above said coil, means distributing water from said feed watersource and delivering it in small volume upon said coil, a refrigeratingcoil entirely within said storage compartment, ,a refrigeratin therein acompressor, an means delivering a refrigerating medium to the coilswithin said compartment and withdrawing same from the coil above saidcompartment, said coils bein connected with each other, and an ofltake aj acent the bottom of said compartment.

10. A water cooler embodying'therein a heat insulated casing, having astorage compartment toward the bottom thereof, a baiiie forming 'acontinuous tortuous channel throu h said compartment, a refrigeratingcoil a ve said compartment, a feed water source communicating with saidcasing above said coil, means distributing water from said feed watersource and delivering it in small volume upon said coil, a refrigeratingcoil extending throughout the entire length of the unit embodyingchannel formed by said baflie, and positioned entirely within saidstorage compartment, a refrigerating unit embodying therein acompressor, and means delivering a refrigerating medium to the coilswithin said compartment and withdrawing same from the coil above saidcompartment, said coils being connected with each other,'and an ofi'takeadjacent the bottom of said compartment, at one end of said tortuouschannel.

11. A water cooler embodying therein a heat insulated casing, having astorage comartment toward the bottom thereof, a baiile orming acontinuous tortuous channel through said compartment, a refrigeratingcoil above said compartment, a trough within said casing directly abovesaid refrigerating coil having a plurality of openings through thebottom thereof through which water in small volume is delivered uponsaid coil, means delivering water within said trough, a trough belowsaid refrigerating coil having an open end adjacent one end of thechannel formed by said baflle, a refrigerating coil extending throughoutthe entire length of the channel formed by said bafile, and positionedentirely within said storage compartment, a refrigerating unit embodyingtherein a compressor, and means delivering a refrigerating medium to thecoils within said compartment and withdrawing same from the coil abovesaid'compartment, said coils being connected with each other, and anoiftake adjacent the bottom of said compartment, at one end of saidtortuous channel.

12. A water cooler embodying therein a heat insulated casing, having astora e compartment toward the bottom thereo a refrlgerating coil abovesaid compartment, a feed water source communicating with said casingabove said coil, means distributing water from said feed watersource anddelivering it in small volume upon said coil, a refrigerating coilentirely within said storage compartment, a refrigerating unit embodyingtherein a compressor, an electric motor actuating said compressor, andmeans delivering a refrigerating medium to the coils within saidcompartment and Withdrawing, same from the coil abovesaid compartment,said coils being connected with each other, an ofitake adjacent thebottom of said compartment, a thermostat submerged in the water in saidcompartment, an electric motor driven pump withdrawing water from saidcompartment and delivering it to said means distributing water from saidfeed water source, and an electric switch simultaneously controlling thecircuit to said motors operatively connected with said thermostat,whereby the operative interval of said compressor and said pump will bedetermined by the temperature of the water in said compartment.

13. A water ooolet embodying therein a heat insulated casing, having astorage compartment toward the bottom thereof, a refrigerating coilabove said compartment, a feed water source communicating with saidcasing above said coil, means distributing water from said feed watersource and delivering it in small volume upon said coil, a valvecontrolling said feed water source, a float within said storagecompartment, connections between said float and said valve, whereby thefeed of water will be controlled by the water level in said compartment,a refrigerating coil entirely within said storage compartment, arefrigerating unit embodying therein a compressor, an electric motoractuating said compressor, and means delivering a refrigerating mediumto the coils within said compartmentv and withdrawing same from the coilabove said compartment, said coils being connected with each other, anolftake adjacent the bottom of said compartment, :1 thermostat submergedin the water in said compartment, an electric motor driven pumpwithdrawing water from said compartment and delivering it to said meansdistributing water from said feed water source, and an electric switchsimultaneously controlling the circuit to said motors operativelyconnected with said thermostat, whereby the operative interval of saidcompressor and said pump will be determined by the temperature of thewater in said compartment.

14. A water cooler embodying therein a heat insulated casing, having astorage compartment toward the bottom thereof, a bafile forming acontinuous tortuous channel through said compartment, a refrigeratingcoil above said compartment, a trough within said casing directly abovesaid refrigerating coil having a plurality of openings through thebottom thereof through which water in small volume is delivered uponsaid coil, means delivering water within said trough, a valvecontrolling said feed water source, a fioat within said storagecompartment, connections between said float and said valve, whereby thefeed of water will be controlled by the water level in said compartment,a trough below said refrigerating coil having an open end adjacent oneend of the channel formed by said baffle, a refrigerating coil extendingthroughout the entire length of the channel formed by said bafiie, andpositioned entirely Within said storage compartment, a refrigeratingunit embodying therein a compressor, an electric motor actuating saidcoinpressor, and means delivering a refrigerating medium to the coilswithin said compartment and withdrawing same from the coil above saidcompartment, said coils being connected with each other, an ofi'takeadjacent the bottom of said compartment at the end of said tortuouschannel opposite to where said trough empties, a thermostat submerged inthe water in said compartment, an electric motor driven pump withdrawingwater from said compartment and delivering it to said means distributingwater from said feed water source, and an electric switch simultaneouslycontrolling the circuit to said motors operatively connected with saidthermostat, whereby the operative interval of said compressor and saidpump will be determined by the temperature of the water in saidcompartment.

In Witness whereof I have hereunto aflixed my signature this 5th day ofApril, 1929.

GEORGE J. HUNTLEY.

